Add event configs to Callback

[limiteinductive]

TL;DR

Added base configurations for events triggered at different intervals during training.

What changed?

• Added StepEventConfig, IterationEventConfig, and EpochEventConfig base configurations for events triggered at different intervals.
• Added the possibility of scoping the random state of a callback trigger.
• Modified CallbackConfig to include configurations for various events.
• A method was added to Callback to run events based on configuration.

How to test?

• Run rye run pytest -k trainer

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